Single sign-on

Single sign-on is used in a domain environment; this is where someone logs in to the domain and then can access several resources such as the file or email server without needing to input their credentials again. Think of it as an all-inclusive holiday where you book into your hotel and the receptionist gives you a wristband that you produce when you want to consume food and drink. federation services and Kerberos (Microsoft authentication protocol) are both good examples of single sign-on. You log in once and access all of your resources without needing to insert your credentials again.

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